Maybe this is more sensefull for lower timeframes but, for Occam's razor, I would say that, for green candles, the natural movement will be open -> low -> high -> close, because it is the shortest path to traverse the candle, and for bear candles, open -> high -> low -> close.

So for green candles, your fraction up will be the full price range, and your fraction down, the wicks.

The complete price_path will be then 2*wicks + body, and for green candles: